Question

22. Reaction H+ + OH (-)+ H2O is :
(A) Very slow
(B) Slow
(C) Fast
(D) Moderate in speed.​

Answer 1

moderate in speed ...........

Answer 2

Answer:

The reaction $H^{+} + OH^{-} - > H_{2} O$ is fast

Explanation:

The given reaction undergoes self ionization method.

The self-ionization equilibrium of water is represented here, with the constant value at 25 degrees Celsius taken from the literature.

$2H_{2} O(I)$ ⇆ $H_{2} O^{+} (aq) + OH^{-} (aq)$

$K_{w} =$ 1.0 × $10^{-14}$ = $[H_{3} O^{+} ][OH^{-} ]$

Given equation is simply the self ionization equilibrium reversed and with hydrogen ion is obtained from hydronium ion.

$H_{3} O^{+} (aq) + OH^{-} (aq)$ ⇆ $2H_{2} O(I)$

The equilibrium constant of this equation is the reciprocal of $K_{w}$

$K_{new} = \frac{1}{1.0*10^{-14} }$

        = 1.0 × $10^{14}$

• The extremely huge value of this new constant indicates how strongly the equilibrium state favors the development of the species of water product.
• A big equilibrium constant does not always indicate a quick reaction as chemical kinetics would suggest.
• But in this circumstance, this reaction is known to happen relatively fast.

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